public class Admin extends User {
    public Admin(String userId, String username, String password, String phone) {
        super(userId, username, password, UserType.ADMIN, phone);
    }

    @Override
    public void showMenu() {
        System.out.println("\n===== 管理员菜单 =====");
        System.out.println("1. 添加新用户");
        System.out.println("2. 查看所有用户");
        System.out.println("3. 修改密码");
        System.out.println("4. 退出登录");
        System.out.print("请选择: ");
    }
}
    